Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition

Details Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition

2009-11-06

arxiv.org/abs/0911.1371v1

Phys Rev E 81 040102R (2010)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We demonstrate that in the atomic-scale limit the thermal conductance $\mathcal K$ of the FPU model and its variants strongly deviates from the mesoscopic behavior due to the relevance of contact resistance. As a result, atomic chains follow $\log \mathcal K = \nu \log T$, where the power law coefficient $\nu$ is exactly two times larger than the mesoscopic value. We smoothly interconnect the atomic and mesoscopic limits, and demonstrate that this turnover behavior takes place in other nonlinear FPU-like models. Our results are significant for nanoscale applications, manifesting an atomic thermal conductance with temperature scaling superior to the mesoscopic limit.

Affiliated with

Also associated with

No associations

Rating

Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal conductance of the Fermi-Pasta-Ulam chains: Atomic to mesoscopic transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-699353